Known for all-out displays for Fourth

Credit: (file)

HOT SEAT: Jeanmarie Louis, below left in back, and Mark Sargent are charged with three arsons including one on South Main Street in West Bridgewater. State Fire Marshal Stephen D. Coan is urging they serve long sentences.

Credit: Herald Pool

Mugshot of Mark Sargent

Credit: Herald Pool

Mugshot of Jeanmarie Louis

Credit: Matthew West

IN COURT: State Fire Marshal Stephen Coan talks about the investigation into a string of 24 fires yesterday at the Brockton office of Plymouth County District Attorney Timothy J. Cruz.

An accused Middleboro arsonist being eyed with his stepson in 24 suspicious blazes is a neighborhood fireworks fanatic who once gushed his gratitude to firefighters who had delivered his newborn son en route to the hospital, authorities said.

Mark Sargent, 45 — arrested Wednesday near the scene of a West Bridgewater fire with his stepson, Jeanmarie Louis, 23 — was told by cops to quench his heavy-duty fireworks show on July 3, 2010, according to Middleboro police.

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